Road Stream Crossing Site CLHW_GCBM-006
Greene Creek-Black Mallard River Watershed, Elliot Creek
Alpena State Rd
Benton Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.6373800000001,-84.39622
T 038NN R 001W Sec 35
Owned by State
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 0 tons/year
Overall Score: 15
Severity: Moderate
Date Inventoried: 4/26/2022
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Other
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 60 ft. Width 17.5 ft. Height 5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 1.4 ft.
Water Velocity*: 0.4 ft./sec.
*Water Velocities were measured 0.2 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.2 ft.
Bankfull Width: 23 ft.
Wetted Width: 17 ft.
Water Velocity: 0.3 ft./sec. (measured via Flow Meter)
Dominant Substrate: Silt – very fine particles that don't stick together
Road Information
Road Surface: Gravel
Owner: County
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 25 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Right Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0 tons/year
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.